This reduces presentlist memory usage by about 50%. It's still
about 2.5x greater than it should be.

Hallvard Furuseth authored Jan 27, 2015 and Hallvard Furuseth committed Jan 27, 2015

Catch a new bi_op_bind[]() case.  Silence warnings in END{}.

Remove assert. This is merely a cache of parent DNs, failure to
insert doesn't affect outcome.

Copied from 58ddb552.

clear rc, otherwise syncrepl stops

Leonid Yuriev authored Oct 17, 2014 and Hallvard Furuseth committed Jan 14, 2015

Inconsistent reading & SIGSEGV due to the race condition.

Leonid Yuriev authored Oct 17, 2014 and Hallvard Furuseth committed Jan 14, 2015

Globally shared fields of meta-data were not 'volatile'.
Code from 9a80a8a8,
except the unportable __synchronize().